Analysis of the Advantages and Disadvantages of the Commonly Used Categories in the Five Doors and Eight Doors

When it comes to home decoration, choosing the right type of wooden door can make a big difference. With so many options available, it's easy to feel overwhelmed. In this article, we’ll explore some of the most common types of wooden doors and their features, helping you make an informed decision that suits your style and needs.

Paint-Free Doors:

As the name suggests, paint-free doors are designed to eliminate the need for additional painting. Most of these doors on the market today are actually PVC veneer doors. They are made by applying a PVC veneer through vacuum blistering onto the surface of a solid wood composite or molded door. This technique not only enhances the appearance but also ensures a smooth, glossy finish without the use of traditional paint.

Advantages of Paint-Free Doors

1. A wide range of colors and modern designs that cater to contemporary tastes and eco-friendly requirements.

2. The surface is smooth and glossy, free from paint, which helps avoid harmful emissions that can be released from other materials after installation.

3. These doors are manufactured in one piece, making them easier to install and reducing the overall project timeline.

4. They offer versatility in design, allowing customization based on personal preferences, environment, and lifestyle, making them a top choice for interior decoration.

Disadvantages of Paint-Free Doors

One major drawback is that lower-quality paint-free doors can be prone to damage over time. They are sensitive to humidity, temperature changes, and air exposure, which may lead to warping or deformation of the surface.

Molded Doors:

A molded door is constructed using molded panels. It is typically made from fast-growing wood that is processed into dry fibers, mixed with phenolic glue and paraffin, then pressed under high pressure and temperature. The result is a high-density fiberboard with a textured, raised pattern, giving it a distinctive look.

Advantages of Molded Doors

1. Cost-effective. Molded doors are produced using two pre-molded high-density fiber panels that are pressed together, making the manufacturing process efficient and less expensive.

2. Offers a variety of styles. These doors can be finished with wood veneer or painted, preserving the natural wood grain. They can also be used for panel mosaics, offering an elegant, lively, and affordable option for any space.

3. Resistant to moisture, with low expansion and deformation rates. They don’t crack or discolor easily over time, making them a durable choice for long-term use.

Disadvantages of Molded Doors

Despite their benefits, molded doors tend to feel lightweight and lack the premium feel of solid wood. They also have limited design options and may not suit more upscale or sophisticated interiors.

Screw Spike

Main styles of Screw spike for different market

* North America-High strength screw spikes

1.Description:High strength screw spikes

2. Size: 1x5-1/8", 1x6", 1x7"

3. Specification: high strength, AREMA 2012

4. Finish: Waxed

5.Reference project

NYCT 2.5 million pcs since 2012


* North America-Normal strength AREMA 2012 or ASTM A66

1.Description:Screw spikes

2. Size: 15/16x6"

3. Specification: Normal strength AREMA 2012 or ASTM A66

4. Finish: Plain finished

5. Packing in 50lb plastic keg

6. Reference project

Supplied 3 million pcs since 2010 to North America


* North America-CS screw spike

1.Description:CS screw spike

2. Size: 15/16"x6-1/2"

3. Material to property:

-Tensile strength 120000 PSI

4. Finish: Hot waxed

5. Reference project

Supplied more than 1 million to North America since 2017

* South America

1.Description:Screw spikes

2.Size: 23x105mm/23X110mm

3.Material: 4.6 to UIC864-1

4.Finish: Plain finished

5.Reference project

Supplied 2 million pcs to South America


* South America-No.2 Screw spike


1.Description: No.2 Screw spike

2. Size: 24x145

3. Material to property:

-Grade 4.6 to UIC864-1 or AISI 1020 steel

4. Finish: Plain oiled.

5.Reference project

Supplied about 2 million pcs to South America since 2006



* Rurope

1.Description: BS Screw spikes

2. Size: 1"x6-5/16", 1"X5-1/8",1"X6-1/8", 1"X6-3/8"

3. Material to property:

-Tensile strength 775-925 N/mm2

-Elongation 20%

-Impact strength KCU≥ 65J

4. Finish: Hot dip galvanized, Black

5.Reference project

Supplied more than 1 million to London Underground since 2008


* Ss & DHS for fastening system


1.Description: DHS35 screw spike

2. Size: 24x161

3. Material to property:

-Grade 5.6 to UIC864-1

4. Finish: Hot dip galvanized, or zinc plated according to requirements of customer.

5.Reference project

Supplied about 1 million pcs to Saudi Arabia since 2014 for SKL14 fastening



1.Description: Ss Sleeper screw including Ss8, Ss25,Ss35,Ss36

2. Size: 24x160 (length 150mm is available), 24X161

3. Material to property:

-Grade 4.6, 5.6 and 8.8 to UIC864-1

4. Finish: Plain oiled, hot dip galvanized, zinc plated.

5. Supply reference

Supplied about 2 million to Kazakhstan since 2009 for SKL14 fastening system



Styles of Track Spike


* To North/South American market

This rail spike is manufactured according to ARMEA specifications or customers' requirements.

Size: 3/4", 1/2", 5/8"
Length: 3", 3-1/2", 4-1/2", 5", 5-1/2", 6",etc
Material: Q235, 35#, Q355, etc.
Surface: Plain,etc


* Material to Grade 5.6 or at customers' requirement, mainly supply to Eurpo

Size: 12X12X115mm,etc

Surface: Plain,etc


*To GOST 5812-82

Standard: GOST 5812-82, stand a tensile strength of 49KN(5ton force)

Size:16X16X165/205/230/280mm, etc

Surface: Plain,etc



*Main supply to Sweden

Size:16X16X170mm, etc

Surface: Plain,etc



* Boat spike

Size:3/8X3/8X6"/8"/10", 1/2X1/2X10"/12"

Material: Q235,etc

Surface:Plain, black, Galvanized, etc.


Sleeper Spike,Washer Head Screw Spike,Square Head Screw Spike,Special Head Screw Spike

TAICANG ZHONGBO RAILWAY FASTENING CO., LTD. , https://www.railfastener.com